We review the structure of Roy–Steiner equations for pion–nucleon scattering, the solution
for the partial waves of the t-channel process π π→ N ̄ N, as well as the high-accuracy …

We present a novel analysis of the π N scattering amplitude in Lorentz covariant baryon
chiral perturbation theory renormalized in the extended-on-mass-shell scheme. This …

When hadron-quark continuity is formulated in terms of a topology change at a density
higher than twice the nuclear matter density (n 0), the core of massive compact stars can be …

We review a series of unitarization techniques that have been used during the last decades,
many of them in connection with the advent and development of current algebra and later of …

Earlier work suggested that the in-medium πN threshold isovector amplitude b 1 (ρ) gets
renormalized in pionic atoms by∼ 30% away from its ρ= 0 free-space value, relating such …

The pion–nucleon sigma term is a quantity involved in many important aspects of particle
and nuclear physics. In this review, I show its origin and how it is connected to important …

According to quantum chromodynamics, vacuum is not an empty space, because it is filled
with quark–antiquark pairs. The pair has the same quantum numbers as the vacuum and …

Topology effects have being extensively studied and confirmed in strongly correlated
condensed matter physics. In the limit of large number of colors, baryons can be regarded as …

The masses of hadrons in the vacuum, where the chiral symmetry is restored, and in the
medium are generally different even when the changes in the order parameters of chiral …

Infinite nuclear matter is studied by resuming the series of ladder diagrams based on the
results developed by us [Ann. Phys.(NY) 437, 168741 (2022) 0003-4916 10.1016/j. aop …